"D. L. Hallahan"@en . "D.L. Hallahan"@nl-NL . . "D. L. Hallahan" . "Hallahan, D. L. (David L.)" . "David L. Hallahan"@en . . "David L. Hallahan" . "D.L Hallahan" . . . "D.L" . . "David Lawrence Hallahan" . "David L." . "D. L." . "Lawrence" . "David"@en . "D." . "L."@en . "Hallahan"@en . . . . . .